Semiconductor Device Magnetic Coupling Signal Transmission
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Solution Overview
Problem
Existing semiconductor devices face challenges in size reduction and high-frequency signal transmission due to the limitations of photocouplers and the need for improved performance in magnetic coupling-based devices.
Innovation Solution
A semiconductor device design featuring multiple coils magnetically coupled in series, with opposing induction current directions to prevent magnetic flux cancellation, enhancing signal transmission efficiency and device performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a photocoupler is used to transmit electric signals between circuits with different potentials, then signal transmission is achieved, but the device size increases and high-frequency signal transmission capability is limited
Solution Approach 1:
The patent replaces the optical system (photocoupler with light emitting element and light receiving element) with a magnetic coupling system using inductors. This substitution eliminates the need for light conversion components, enabling device miniaturization while maintaining signal transmission capability between circuits with different potentials.
Solution Approach 2:
The patent changes the fundamental transmission mechanism from optical to magnetic coupling, allowing the device to achieve both size reduction and improved high-frequency performance by utilizing electromagnetic induction principles instead of light emission and detection.
2Volume of moving object
If multiple coils are magnetically coupled to transmit signals, then device size is reduced, but magnetic flux cancellation may occur reducing signal transmission efficiency
Solution Approach 1:
The patent employs asymmetric winding directions for adjacent coils, where odd-numbered coils are wound in one direction and even-numbered coils in the opposite direction. This asymmetric configuration ensures that magnetic fluxes from adjacent coils reinforce rather than cancel each other, maintaining signal transmission efficiency in the miniaturized device structure.
Solution Approach 2:
The patent inverts the winding direction of alternating coils to reverse the polarity of induced currents. By making induction currents flow in opposite directions in adjacent coils, the magnetic fluxes add constructively instead of canceling, solving the signal efficiency problem in compact magnetic coupling designs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design improves signal intensity and device performance by preventing magnetic flux cancellation and optimizing signal transmission between coils, leading to enhanced semiconductor device performance.
Implementation Method 1
the first coil and the second coil are magnetically coupled to each other
Implementation Method 2
the third coil and the fourth coil are magnetically coupled to each other
Data Source
AI summary
On a semiconductor substrate, coils CL5 and CL6 and pads PD5, PD6, and PD7 are formed. The coil CL5 and the coil CL6 are electrically connected in series between the pad PD5 and the pad PD6, and the pad PD7 is electrically connected between the coil CL5 and the coil CL6. The coil magnetically coupled to the coil CL5 is formed just below the coil CL5, the coil magnetically coupled to the coil CL6 is formed just below the coil CL6, and they are connected in series. When a current is flowed in the coils connected in series formed just below the coils CL5 and CL6, directions of induction current flowing in the coils CL5 and CL6 are opposed to each other in the coils CL5 and CL6.